{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120189607",
    "entityType": "Track",
    "nonce": "0x6336b1e9ffe9fd26a1dfd5a804a955394b51ee4776f2e97c0c9c503dd56c5d5e",
    "signature": "0x20540dd682fa68cd7001bc53a4b5df8cab7d1da7eef1a5f6caec61dce94ba9ef361468c2b702d1df4ffb6fc67e5fb899b124d6f54551afa4cda52ce8e8a1efde1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}